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Vishay General Semiconductor - Diodes Division SMBJ43CAHM3_B/H
- Part No.:
- SMBJ43CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CAHM3_B/H.pdf
- Description:
- 600W,43V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
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Product details
Overview
SMBJ43CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ43CAHM3_B/H datasheet, SMBJ43CAHM3_B/H pinout, SMBJ43CAHM3_B/H application, or SMBJ43CAHM3_B/H equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (HM3 suffix), and AEC-Q101 qualification readiness via HM3 automotive variant path.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at VWM), but avalanches rapidly (<1 ns response) when transient voltage exceeds its breakdown threshold (VBR min = 47.8 V, max = 52.8 V at 1 mA). Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Thermal design relies on low RθJL (20 °C/W) and moderate RθJA (100 °C/W), requiring PCB copper pad thermal relief per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation. The glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and long-term reliability across -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 36–48 V nominal systems. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 69.4 V at 8.6 A - clamping voltage during 10/1000 µs surge; limits downstream stress to <1.62× VWM. |
| PPPM | 600 W - peak pulse power handling with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off; avoids signal distortion or bias shift in high-impedance circuits. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with automated pick-and-place. |
| Temperature Range | -55 °C to +150 °C - full operational junction range; supports under-hood and industrial control environments. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as anode or cathode depending on transient polarity; enables AC line or differential bus protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust IEC 61000-4-5 surge immunity up to Level 4 (4 kV line-to-line) in properly laid-out PCBs. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfacing with 43 V rails. |
| MSL Level 1 (260 °C reflow peak) | Enables single-pass lead-free reflow assembly without baking or special handling. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills environmental compliance requirements for EU, China RoHS, and JEITA standards. |
| AEC-Q101 qualification path (HM3_X) | Supports automotive-grade sourcing via revision-coded variants (e.g., SMBJ43CAHM3_B/I), validated for stress testing per AEC specification. |
Applications
| Industrial Motor Drives | Telecom Line Interface |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from 24–48 V DC motor switching. IC Role / Device Role / Timing Role: Shunt TVS clamping transient spikes before they reach isolated gate drivers or op-amp input stages. Use Value: Prevents latch-up or permanent damage to 5 V microcontrollers and SiC MOSFET gate oxide by limiting voltage to ≤69.4 V during 8.6 A surges. |
Use Scenario: Surge protection on RS-485 or Ethernet PHY signal pairs exposed to lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Bidirectional clamping element placed differential-mode across twisted-pair lines prior to ESD-rated transceivers. Use Value: Maintains signal integrity below 100 V clamping threshold while surviving repeated 600 W pulses - essential for field-deployed telecom infrastructure. |
| Automotive Body Control Modules | Consumer Sensor Hubs |
|
Use Scenario: Input protection for LIN bus or CAN FD transceivers connected to external harnesses subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on power and data lines entering BCM housing. Use Value: Leverages AEC-Q101-ready HM3 construction and -55 °C to +150 °C operation to meet automotive reliability targets without derating. |
Use Scenario: ESD and surge protection for I²C/SPI lines linking MEMS accelerometers, gyroscopes, and environmental sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) shunt clamp on high-speed digital buses adjacent to sensitive analog front-ends. Use Value: Limits ESD-induced upset with sub-nanosecond response and <1 µA leakage - preserves sensor accuracy and communication stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/52 | Same electrical specs, RoHS-compliant (E3), non-halogen-free; MSL Level 1, commercial grade only. | Lacks halogen-free certification and AEC-Q101 qualification path; suitable for cost-sensitive non-automotive designs. | Select when halogen-free content or automotive qualification is not required; lower cost than HM3 variants. |
| SMCJ43CAHM3_A/H | Same VWM/VC/PPPM, but SMC (DO-214AB) package - larger footprint (7.11 mm × 6.22 mm), higher thermal mass, RθJA = 50 °C/W. | Better thermal performance for high-duty-cycle surges; requires more PCB area and may not fit space-constrained layouts. | Choose for elevated ambient temperatures or repetitive surge environments where SMBJ43CAHM3_B/H thermal margin is insufficient. |
Compared with SMBJ43CA-E3/52, SMBJ43CAHM3_B/H adds halogen-free compliance and AEC-Q101 qualification readiness; versus SMCJ43CAHM3_A/H, it trades thermal robustness for compact SMB footprint - making SMBJ43CAHM3_B/H optimal for space-limited industrial and telecom modules needing environmental and reliability assurance.
Availability
SMBJ43CAHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive body control modules, and consumer sensor hubs requiring stable component supply with halogen-free and AEC-Q101-aligned sourcing.
Supply support for SMBJ43CAHM3_B/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series delivers standardized, high-power TVS protection in compact surface-mount packages for industrial, automotive, and communications systems - engineered to meet stringent surge immunity and environmental compliance requirements.
FAQ
What is the clamping voltage of SMBJ43CAHM3_B/H at its rated peak pulse current?
The SMBJ43CAHM3_B/H has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 8.6 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and reflects worst-case voltage seen by downstream circuitry during surge events. The SMBJ43CAHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ43CAHM3_B/H suitable for automotive applications?
SMBJ43CAHM3_B/H uses the HM3 suffix indicating halogen-free, RoHS-compliant construction and is part of Vishay's AEC-Q101 qualified product family - with variants like SMBJ43CAHM3_B/I explicitly certified. While SMBJ43CAHM3_B/H itself is commercial-grade, its manufacturing flow and test coverage align with AEC-Q101 requirements, enabling direct qualification path for automotive use with documented revision codes.
How does the bidirectional nature of SMBJ43CAHM3_B/H affect its circuit placement?
Because SMBJ43CAHM3_B/H is bidirectional, it has no polarity marking and functions identically regardless of orientation on the PCB. This allows flexible placement across AC-coupled lines, differential buses (e.g., RS-485), or uncommitted power rails - eliminating orientation errors during assembly and simplifying layout for symmetric protection schemes where both polarities of transients must be suppressed.
What is the maximum reverse leakage current for SMBJ43CAHM3_B/H at its stand-off voltage?
The SMBJ43CAHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 43 V and TA = 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor inputs or battery-powered circuits, preserving signal fidelity and extending system standby life without requiring additional filtering or compensation.
Does SMBJ43CAHM3_B/H require special PCB layout considerations for thermal performance?
Yes - Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal to achieve rated PPPM and thermal resistance (RθJA = 100 °C/W). Reducing pad size or omitting thermal vias degrades surge handling and increases junction temperature; for sustained surge duty cycles, designers should follow Vishay's recommended mounting pad layout in Document Number 88392 to ensure SMBJ43CAHM3_B/H performs to datasheet specifications.
SMBJ43CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ43CAHM3_B/H FAQ
1.How can I place an order for SMBJ43CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CAHM3_B/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ43CAHM3_B/H reliable?
The price and inventory of SMBJ43CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ43CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CAHM3_B/H?
SMBJ43CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CAHM3_B/H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ43CAHM3_B/H?
For technical support, including SMBJ43CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ43CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43CAHM3_B/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ43CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ43CAHM3_B/H?
All SMBJ43CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CAHM3_B/H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ43CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ43CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CAHM3_B/H Tags
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